The sibling-trio gained national attention after they auditioned for the talent-show in May. Their performance of "Heaven's Not Too Far," a tribute to their late mother, has more than 47 million views on Facebook.

The three have been playing together since the were children, Blanchard said, and making it this far on the show is more than they could have hoped.

"The moment when we finally realized, with Noah (Guthrie), that we were both going through (to the live shows), we kind of had to pinch ourselves a bit," she said. "Like, OK, this is actually happening."

WE MADE IT TO THE LIVES!!! We can’t begin to describe how we felt in this moment.... We cannot wait to share more of our story with you all through our music. Thank you for believing in us. Live shows here we come!!! pic.twitter.com/BYfkbQcFDZ

Worried they would be split up, the group had never really considered doing a talent-show before, Blanchard said. After being contacted through their Instagram, they decided to send in an audition for "America's Got Talent."

Going into the auditions, the siblings were determined to just do their best. But, after making it through to the Judge Cuts, the stakes were higher.

"The Judge Cut round was intense," Blanchard said. "It really was different than the first one because you have a glimpse of what could happen. So, you are a little more invested now."

Both songs they performed on the show have been originals. The first was written from the perspective of their mother who passed away from cancer in 2016. The second, "Lifeline," was a song they finished in just two days after their audition.

Blanchard said the chorus was exactly how her brother, Manny, felt in the moment, and the lyrics were true to what they were experiencing at the time.

"This song is about dealing with your demons, and coming to the realization that sometimes in life it's OK to not be OK," he said before performing "Lifeline" on Tuesday night's episode.

All five judges, including guest judge Martina McBride, had nothing but positive reactions to We Three's performance.

"It was just so vulnerable and real, and I think that people need to hear that song and more from you guys," McBride said.

Looking to the live shows, Blanchard said that the group will continue to perform original music. And while some may not be able to imagine working with their siblings, We Three couldn't imagine experiencing this with anyone else – continuing to push and keep each other humble.

"These shows are so incredible and they give people such amazing opportunities," she said. "We hope to take advantage of the platform we've been given."

Abby Luschei is the entertainment reporter for the Statesman Journal; she can be reached at aluschei@statesmanjournal.com or 503-399-6747. Follow her on Twitter @abbyluschei or facebook.com/luscheiabby.